Product features: * Japanese copper-based semi-metallic materials technology， environmental protection， low noise. * Stable friction performance， sensitive brake， good braking performance. * Fade resistance performance is good， not to hurt the disk， comfort and long service life. Note: * Unauthorized change product ingredients. * Non-long ultra-speed. * Non-friction material surface with oil or lubricating substances to prevent reducing the coefficient of friction and cause brake failure. The following picture is taken in kind